I have tried 3 different filters on my R, and ALL of them have let some sort of grit in at one time or another. I went to go clean my filter tonight, and same as always, there was a real fine dust on the inside of the airbox. This wouldn't be a big issue, but I have to clean out my carb more then I should because I keep sucking fine dust into the airbox. What does everyone out there use to seal off their filters? Anyone else get fine dust in their airbox?